Tryndamere needs a rework!

I HAVE AN IDEA FOR REWORK!!!!!!! what about when he ults he instead of taking damage he gets red health (reduced from armor and mr) . after the seconds it takes for his ult to end he takes that 125% of that damage as true damage. this makes it easyier for him to ult so if you ult early you still get it to do something and it negates missing health damage. it can still be used to do an insane turret dive but even if you do that you still get hurt unlike before. This idea prob needs to be changed alittle and balanced but I like the concept.